Direct access to 2-difluoromethyl indoles via photoredox catalysis

Add time:07/16/2019    Source:sciencedirect.com

A visible-light mediated approach to radical difluoromethylation of 3- and 3,5-substituted indoles was investigated using a readily synthesized difluoromethyl source, CF2HPPh3Br. Direct difluoromethylation of indoles in the two position is a rare feat in the literature. The reactions were conducted at room temperature, using Ir(ppy)3 as photocatalyst in acetone, to afford the 2-difluoromethyl indoles in relatively low to moderate yields.

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